The late Christopher Hitchens called conspiracy theories the “exhaust fumes of democracy” — the unavoidable result of large amounts of information circulating among a large number of people.

The latest conjectural haze drifting in from the fringes of the political spectrum is that the United Nations’ agreement on migration, which Canada is set to sign in Morocco next week, will see this country lose control of its borders.

The Rebel’s Ezra Levant called the UN’s global compact on migration “dangerous” — “a done deal cooked up by unelected bureaucrats with no regard for national sovereignty.”

Andrew Scheer, the Conservative leader, said his party strongly opposes Justin Trudeau’s plan to sign Canada onto the compact, saying it will open the doors to foreign bureaucrats to direct immigration policy. He was specifically concerned about an objective in the compact that deals with how media report on migration issues. The section calls for an effort to eliminate “all forms of discrimination” in public discourse about migration issues — which, if enforceable, would be an existential threat to The Rebel.

Andrew Scheer, the Conservative leader, said his party strongly opposes Justin Trudeau’s plan to sign Canada onto the compact, saying it will open the doors to foreign bureaucrats to direct immigration policy

After question period on Wednesday, Scheer asked for unanimous consent for a statement that urged the government not to sign the compact and which blamed the UN for the torrent of refugees that has crossed into Canada from the U.S. Not surprisingly, he did not get it.

For now at least, Scheer’s fears are overdone. The potential limitations on media reporting, for example, are not enforceable. Chris Alexander, a former Conservative immigration minister, pointed out that the compact is a political declaration, not a legally binding treaty. “It has no impact on our sovereignty,” he wrote on Twitter.

Migrants sit on the deck of the Nuestra Madre de Loreto, a Spanish fishing vessel, as it carryied 12 migrants rescued off the coast of Libya on Friday, Nov. 30, 2018.Javier Fergo/AP Photo

Trudeau made the same point on Wednesday, as he boasted about Canada’s “global leadership” and its adoption of “open policy.”

It’s hard to find anything particularly offensive in the compact — it says refugees and migrants are entitled to universal human rights; that countries should improve co-operation on international migration to save lives and keep migrants out of harm’s way. It is explicit that it is not legally binding and the sovereign rights of states to determine their own migration policy is re-affirmed.

Still, I remain unconvinced that Canada should sign on. The compact also says that states should “determine their legislative and policy measures for the implementation of the global compact.” The very act of signing creates an expectation that the signatories will take action. It’s not nothing.

We have heard in the past about UN declarations being merely “aspirational.” As it turned out, they have become much more than that.

Take the UN Declaration on the Rights of Indigenous Peoples, which was also sold as a non-binding, aspirational document.

When it was introduced in 2006, the Harper government opposed the declaration’s 46 articles, on the practical grounds that previous court decisions had referenced the work of UN bodies and used them to interpret the laws of Canada. One article in the draft version could have been interpreted to mean military activities could not take place on land that had traditionally been Aboriginal.

The late Jim Prentice, who was then Indian Affairs minister, said the declaration was inconsistent with Canadian law and refused to sign. The declaration only received the Canadian government’s unqualified support in 2016 under the Trudeau government. The new prime minister had already agreed to “fully adopt and implement” the UN declaration, even though his justice minister, Jody Wilson-Raybould, called it “unworkable” and a “political distraction.”

Justic Minister Jody Wilson-Raybould rises during question period in the House of Commons on Parliament Hill in Ottawa on Thursday, Nov.1, 2018.Adrian Wyld/The Canadian Press

Whatever your views on the declaration, it is beyond dispute that it is not merely an “aspirational document.”

In fact, it is now the law, after NDP MP Romeo Saganash’s private members’ bill was passed by the House of Commons last May. The bill required that Canada’s laws be consistent with the declaration.

In the coming months and years, legislation and judicial interpretation will determine whether Canada’s existing jurisprudence on the duty to consult is sufficient to meet the UN declaration’s requirement on the need to secure “free, prior and informed consent” in any given area of policy. Critics argue that the passage into law of the declaration gives Indigenous Canadians rights not enjoyed by other Canadians.

What was presented as a nice thing to do to be onside with a global consensus has now evolved into a situation that could yet result in legislative gridlock, if the declaration’s provisions on the “rights of self-determination” are taken at face value.

The global compact’s intentions may be pure, but there will be consequences to its adoption that could over time impact Canada’s ability to set its own course on migration.

It won’t erase the border but it could erode sovereignty on immigration. You don’t have to inhale the exhaust fumes of the online conspiracy theories to believe that signing the UN global compact on migration is not a great idea.